Car-jack.



' F. CHRISTENSEN.

' CARJACK'.

APPLICATSON HLEB JUNE 21,19l6.

rammed m. 11, 191

F. CHRISTENSEN.

CAR JACK. .APPUCATWN mm mm 21.1916.

Patmfsed, Dan M, 191?.

FREDERICK CHRISTENSEN, OF GREAT FALLS, MONTANA, ASSIGNOR OF ONE- ALFREDWALBON, OF GREAT FALLS, MONTANA.

CAR-JACK.

Specification of Letters Patent.

Patented Dec. 11, n.

Application filed. June 21, 1916. Serial No. 104,849.

To all whom it may concern:

Beit known that I, FREDERICK CHnIsTnN- SEN, a citizen of the UnitedStates, residlng at Great Falls, in the county of Cascade, 1n

the State of Montana, have invented cerin car jacks and its object is toproduce a device of this class that is simple in construction, positiveand etlicient in operation and cheap to manufacture. With the foregolngand other objects in viewthe invention consists in the combination andarrangement of parts to be hereinafer fully described in thisspecification, pointed out in the appended claim and illustrated in theaccompanying drawings which form a part ofsaid specification andinjWhich- F igure 1 is an edge elevation of an ordinary car wheel andits journal box, in section, showing the application of my improved carlack. Fig. 2 is a side view of Fig. l.

Fig. 3 is a plan view of the adjustable base of the car jack.

Fig. 4. is a side elevation, partly in section, of a modified form ofthe device.

Fig. 5 is a side elevation of the support-,

ing spool used with the modified form of the device. j M

Fig. 6 is a perspective view of one of the foot plates carried by thebase of the ack.

Like reference characters denote corresponding parts throughout theseveral views.

My car jack comprises essentially a base formed of two adjustable metalstraps 1, 2 each of which is formed with an elongated central slot 3which slots receive the bolt 4c that adjustably connects the saidstraps. The strap 1 is provided with foot plates 5 adjustably securedthereto by bolts 6 and said foot plates are-formed with spurs 7 portingsurface such as a railroad tie or the like as shown in Figs. 1 and 2 ofthe drawin gs. The strap 2 is formed at one end with an integral angulararm 8 which arm near its terminal is extended outwardly from the bodyportion of the strap to form aholdinghead 9.

Upon the strap 2 the screw 10, or a spool B carrying a pony screw 0, issecured by a sultable bolt passing through the slot 3 of that strap; thescrew being provided with the usual head 11 formed with the apertures 12through which the handle 18 may be passed andmanipulated to raise orlower the block 1% that directly engages the load. In Figs. 1 and 2 ofthe drawings the jack is shown applied to the wheel and journal box of arailroad car. In use, when the car wheel 15 has a hot box my improvedjack is placed beside the wheel with the strap 1 running transversely ofthe rail ties and the foot plates 5 directly engaging the ties. Sincethe straps 1,2 are relatively adjustable it is not necessary that thewheel should have its vertical center above a rail tie as the jack maybe positioned between'the ties as well as directly over any one of thesame. When the screw 10 (or 513001 B, Fig. 4'.) is so adjusted that theblock 14 can be moved into engagement with the journal box 16 the handle13 is so manipulated as to cause the said engagement, the holding-head 9of arm 8 having been placed in engagement with the rim 17 of the wheelto anchor the same to the rail. The box 16 is now raised to per Initremoval of the brasses 18, or other interior fittings, and new brassesmay be inserted and the handle 13 may then be manipulated to lower thesaid box 16 again to normal position.

What is claimed is j T In a car jack, a longitudinally slotted strap,foot plates for said strap, a second strap secured to the slottedportion of said first named strap for transverse or rotary movementthereupon, said second strap being adapted to carry a lift screw, and anarm carried by said second strap and formed with a terminal head.

In testimony that I claim the foregoing as my own I have hereto atlixedmy signature adapted to obtain a purchase upon a supin the presence oftwo subscribing witnesses.

FREDERICK CHRISTENSEN.

Witnesses:

ALFRED IVALBON, CARL D. ANDERSON.

Copies of this patent may be obtained for five cents each. by addressingthe Commissioner of Patents,

. Washington, D. C.

HALF T0

